Any one use glass marbles to take up the space after racking
Only the jugs that had marbles once broke in this way. One did it after the marbles were taken out.
For the record, that guy is a brilliant political comedian. So good it would seem he's able to scare our friends from over the pond!
Mind you, it wouldn't be so believable if our politicians weren't such utter useless twats.
Could corks be used to fill headspace? I was thinking synthetic corks; just ram a few in there (maybe attach two or three with a needle or something) until they're lodged below the neck...
I've done this with synthetic cork and it does work. Downsides are that a lot of sediment winds up settling on these floaters and when you start to take them out, you get cloudy mead. The other issue is the synthetic cork can pick up aroma (or odor). If you search for my Naughty Rosie meadlog I have some that still smell like heather honey despite being cleaned, soaked in PBW, bleached and run through a dish washer.